Steam-turbine.



PATENTED (FINE 5, 1906 J. STUMPF.

STEAM TURBINE.

APPLICATION FILED $31 1, 8.1903.

/n Venlyors (JO/73m? Siam/37f y Sit! rss earns JOHANN s'rUMPr, or cars 1 LOTTENBURG. GERMANY. ASST ERAL ELECTRIC COh IPANY, A CORPORATIION ()F l\" STEAitb-TLIFEEENE.

Specification of Letters Patent.

Patented June 5, 1906.

Application filed September 8,1908. Serial 1%. 172,5 31

To all whont it 71mg, concern.-

Be it known that I, Jonas)? STUMPF, a subect of the King of Prussia, German Emperor, and a resident 01"27 ltanlres trasse, Charlottcm bur" near Berlin iun dom or Prussia Ger- :a; 1 man Empire, have invented certain new and useful Imncvcments in Steam or Gas Turb1ncs,of w ich the following is an. exact specification.

My invention relates to improvements in steam or gas turbines, and more especially to means for regulating such turbines in which the steam is utilized in several steps-that is to say, in which the first turbine-wheel is actuated by fresh steam, while the second one is actuated by the exhaust-steam of the first one, andso on until the energy of the motive fluid is abstracted.

The invention is advantageously applicable to turbine-Wheels rotating in opposite directions, in whichturbine the driving medium flows upon the first turbine-wheel and passes from this first turbine-wheel directly to the second one. Such turbines can be advantageously used for driving several screwpro ellers, dynamo-machines, and the like.

' 'lurbines of the kind described have hith erto been regulated by connecting a governor With the primary turbine-Wheel, which overnor influences the admission of the resh steam. In case, however, the single turbine-Wheels drive diflerent independent machines the effect of this governor is not suflicient. If, for instance, one of the secondary Wheels is not loaded, the remaining Wheels will not be influenced. For instance,

- in case of a turbine with two turbineovheels rotating in up osite directions the primary Wheel will not he influenced at all, by reason of the.fact that the secondary Wheel is not loaded. In consequence of this it follows that the absence of load on the secondary wheel will not influence the admission of the steam. A racing of the secondary wheel is heel it""h a governor whicl'i influences the steam admission.

The invention is carried in to effect advai'in'igeously in such a way that the governor of the primary tiubino-wliccl governs the Stet-ill admission in the .ormal state of the turbine and that a governor is arranged for the ondary turhinc-whecl, which 'o vernor dlniinishes tho cuts the some off soon he number of r0. olu tions of the secondary tain limits.

The invention may also be carried into cficct by means of" one governor, i n which case both turbine-wheels mu t actuate this governor, which may be eil'ected, tor instance, by inserting a difl crcntial gearing which acts in such a way that only that turbiire-wheel which has the greatest number rcvolutions acts upon the Werner.

In many cases it v i i be sulil cicnt that by the second or third turbine-wl eel no real regulacase of the racing of these turbine-wheels means are provided by means of which a steam admission is Wholly or partl 7 cut oil": This may be attained by connecting the turbine with a quickly-closing valve which acts if a certain number of revolutions is surpassed.

In order to make my invention more ciear, I refer to the accompanying drawing, which is a scheme showing my invention applied to a turbine with two turbine-Wheels rotating in opposite directions.

a and Z) are the turbine-wheels, fixed to the ends of the shafts c and b. The turbine- Wheel 0. is impinged upon by the steam guided upon the same through the nozzles c. This steam. flows through the vanes of the turbine-wheel a immediately into the vanes of the turbine-wheel I). It will be clear that the vanes must be situated in opposite directions and that the turbine-wheels consequently rotate in opposite directions. The nozzles e are connected to a common annular channel f, connected to the stca1n-admission P 1 9" t is a throttle valve situated in the steam admission pipe. Upon the shafts a and d governors h h are respectively arranged, which governors are connected to the throttle-valve t.

It Will be understood that the invention cannot only be applied to turbines with turblue-wheels rotating in opposite directions, but that the invention may be applied to all turbines with several turbine-Wheels which work independently from one another. If the secondary turbineavheel is only connect ed with a cut-oil valve for the steam admission, this cut-oll' valve may be actuated in any convenient manner as, for instance, in case of driving dynamo-machines the cutofi valve may be actuated by the increasing of the current, in pumps or ventilators by the increasing of the pressure or in the like 1 manner.

Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the Un' ted States is- 1. in a steam or turbine, the combination ol a plurality of turbine-wheels, means for admitting steam to said turbine, and governor mechanism for governing the steam admission actuated by each turbine-wheel, substantially described. I

2. In a steam or gas turbine, the combina tion of several turbine-wheels adapted to act upon separate machines, means for admitting steam to said turbine, means for regu lating the admission of said steam, and governing means actuated by each turbinewheel for controlling the regulating means, substantially as described.

,3. In a steam or gas turbine, the combination of a plurality ofturbine-wheels, means for admitting steam to the primary wheel, and a governor for each'wheel adapted to govern the admission of steam to said primary wheel, substantially as described.

4. In a steam or gas turbine, the combination of a plurality of turbine-wheels adapted to act on separate machines, means for admitting steam to the primary Wheel, a governor for each turbine-wheel, a valve for controlling the steam iadmission, and connections between the governors and said'valve, substantially as described.

5. In' an elastic-fluid turbine, the combination of lucket-wheels mounted on separate shafts and driving independent loads, a governing mechanism controlling the admission of motive fluid to the wheels, and connections between the independent shafts and thegovv erning mechanism for actuating the latter.

In testimony whereotl have signed -my name to th s specification in the presence of two subscribing Witnesses. F

J OHANN STUMPF. Witnesses: 1

HENRY HAsrER, WoLnnMAR- HAUPT. 

